Senior Software Engineer (Java)

ARQ
London, United Kingdom
Hybrid

Who this role is best for

Aimed at senior Java backend developers who thrive in hypergrowth fintech environments and have a track record of delivering complex, high-impact products.

Best fit for

  • Senior Java developers with experience in high-growth fintech startups and a history of building complex products for millions of users
    — “Track record of building complex products that millions of people use in hypergrowth startups”
  • Candidates who are fluent in Java and experienced in greenfield development and system evolution
    — “The work will focus on greenfield development and improvement of existing systems”
  • Individuals with a background in computer science, mathematics, or physics and a strong grasp of clean code principles
    — “Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering / Science disciplines”

Things to consider

  • Requires in-office presence for 3-4 days a week, which may not align with fully remote preferences
    — “Office Policy: 3-4 days a week in-office”
  • Candidates must be fluent in English, both verbally and in writing, for effective communication
    — “excellent communication skills (english fluency, verbal and written)”

How to stand out

  • Highlight your experience with Java-based microservices and REST API development in your resume and interviews
    — “engineering microservices and evolving a number of systems”
  • Emphasize your background in clean code practices, TDD, and DDD in your application materials
    — “pragmatic approach to develop our business logic, focusing on clean code, with emphasis on maintainability and fast turnaround with TDD, DDD”
  • Showcase projects that demonstrate financial inclusion impact or fintech domain knowledge
    — “create solutions that drive financial inclusion and transform the way people manage their money”
Pace · SteadyCollaboration · HighAutonomy · MediumDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • design, develop, and maintain scalable, secure, and high-performing backend systems
  • collaborate with a talented team to create solutions that drive financial inclusion and transform the way people manage their money
Typical background
software engineeringbackend development

Skills & requirements

Required

JavaSpring BootREST ApisMicroservicesClean CodeTDDDDDContinuous Integration & DeliveryBackend Development

Preferred

Postgres DatabaseCard PaymentsTreasury ManagementTransactions BookingCrypto Liquidity

Stack & domain

JavaSpring BootPostgreSQLREST ApisMicroservicesClean CodeTDDDDDContinuous Integration & DeliveryCommunicationFintech

About the role

Original posting from ARQ via Ashby

ABOUT ARQ

ARQ is one of the fastest-growing fintechs in the world. Our mission is to redefine how people interact with money across borders, building the infrastructure to move value seamlessly. We’re still early in our journey, which means every person who joins shapes the future of our product, culture, and growth. If you’re excited by big challenges, global impact, and the chance to grow fast with a world-class team, ARQ is the place to do it.

WHAT WE'RE LOOKING FOR

As a Backend Engineer, you’ll design, develop, and maintain scalable, secure, and high-performing backend systems that power our innovative products. You’ll collaborate with a talented team to create solutions that drive financial inclusion and transform the way people manage their money.

WHAT YOU'LL BE DOING

  • The work will focus on greenfield development and improvement of existing systems
  • Projects will include building REST APIs, engineering microservices and evolving a number of systems that our business depends on (e.g. card payments, treasury management, transactions booking, crypto liquidity)
  • Our technology stack is based predominantly on Java 25 on the backend with Postgres database
  • We rely on Spring Boot for quick and quality delivery
  • We have a pragmatic approach to develop our business logic, focusing on clean code, with emphasis on maintainability and fast turnaround with TDD, DDD and continuous integration & delivery

WHAT YOU'LL NEED

  • Demonstrable experience in Backend development, with fluency in Java
  • Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering / Science disciplines
  • Quick learner with an ambitious and results driven personality, with excellent communication skills (english fluency, verbal and written)
  • Track record of building complex products that millions of people use in hypergrowth startups

BENEFITS

  • Competitive salary and benefits
  • Stock options, so you own part of what you build
  • Discretionary performance bonus
  • The latest tools and technology
  • A world-class team that will challenge and grow your skills
  • The opportunity to help build the best fintech app in Latin America
  • Office Policy: 3-4 days a week in-office

Source: ARQ careers (Ashby)

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